Hydrogen uptake in austenitic stainless steels by exposure to gaseous hydrogen and its effect on tensile deformation
Hydrogen uptake in austenitic stainless steels by exposure to gaseous hydrogen and its effect on tensile deformation
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DOI：
10.1016/j.corsci.2011.04.022
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发表时间：
2011-08
影响因子：
8.3
通讯作者：
Y. Mine;T. Kimoto
中科院分区：
文献类型：
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作者：
Y. Mine;T. Kimoto
通过在110-235 °C温度范围内暴露于10 MPa压力下的气态氢来测量Fe-Cr-Ni奥氏体不锈钢的氢溶解度和扩散率。氢的溶解度取决于合金的成分，而在给定的温度下的扩散系数几乎相同。通过暴露于高压气态氢，稳定奥氏体钢中的氢吸收导致一些延展性损失，而它们的断裂表面显示出塑性变形的证据。这是由于在氢的存在下，塑性变形的不均匀性增强，并且随着氢浓度的增加，塑性不稳定性的应力增加。
Hydrogen solubility and diffusivity of Fe–Cr–Ni austenitic stainless steels were measured through exposure to gaseous hydrogen at a pressure of 10 MPa over the temperature range 110–235 °C. The hydrogen solubility depended on the alloy compositions, whereas the diffusion coefficients were nearly identical at a given temperature. Hydrogen uptake in the stable austenitic steels by exposure to high-pressure gaseous hydrogen led to some loss of ductility, while their fracture surfaces showed evidence of plastic deformation. This was attributed to the enhanced inhomogeneity of plastic deformation in the presence of hydrogen and the increased stress for plastic instability with increasing hydrogen concentration.